How to calculate filter RF for different frequencies?

[veioloko]

Hello!

I´m doing a project, and it needs to pass in some tests.
For example i will apply many frequencies to the product and it can´t oscilatte.
I having problems with 70MHZ - 130 MHZ ....
I think it comes by the cable.
How can i solve this problem?
Is there any software where i can calculate the filter?
sorry for my english

 

[boncker]

Re: How to filter RF

Try to build Butterworth filters because it is smoother than others (Chebychev and Elliptical).
In the website https://cnx.org/content/m10127/latest/ you can find some tips about this filter.
I don't remember very well the filter calculus, but is not difficult.

Good luck!

 

[veioloko]

Re: How to filter RF

Thanks for the help
however i want a filter for High voltages...like 220vac

 

[veioloko]

Re: How to filter RF

nobody?